> With tools like message queues and Docker making it so easy to scale horizontally you don't even have to go vertically. That depends entirely on the workload

> With tools like message queues and Docker making it so easy to scale horizontally you don't even have to go vertically. That depends entirely on the workload. It's not always a good idea to move from one sql instance, to a cluster of them. Just buy the better machine that gives you time to make a real scalable solution.